Re: FFJMOORE Big Blue FINISHED!!! 11-20-11
Had a guy from france ask me how to convert to 12v so i did a little write up.
Converting to 12v is not very complicated. First lets make sure we understand each other. The stator is the part on the motor the makes the electricity. The rotor is a magnet that spins around inside the stator. The rectifier converts the electricity from AC current to DC. The regulator keeps the volts from over charging the battery. Ok so the CB125 has most of those parts but does not have the regulator. The 125 has a balanced system. It only creates enough power to run the bike and charge the battery. There are 2 power wires that come out of the stator. 1 makes enough power to run the bike and charge the battery. This one is always on.. The other is for the headlight. When you turn the headlight on this second power wire is also turned on to create enough energy to run the headlight.
Ok, the way I found easiest to convert to 12v you will need 2 things.
1) Stator from a CB350 Twin
2) 12v regulator. I used one from a cb350 twin
The stator fits right into the 125. The plug is different as well as the rubber seal where the wires pass through the case. I cut the plug off the 125 stator and slid the rubber part off. Then i cut the plug off the 350 stator and slid the rubber part onto the 350 stator wires. I had to drill the holes a little to get the wires back in. Then i crimped on new connectors for the 125 plug.
So at this point you have changed the stator to 12v. Now you need to wire in the regulator. I dont remember how that goes but if you look at a wire diagram from a CB350 twin that will explain it better then i can.
http://www.wiringdiagrams21.com/wp-content/uploads/2008/07/Honda-CB350-K4-Wiring-Diagram-1024x738.jpg
Now remember when i said that the 125 has 2 power wires, one for the bike and one for the head light? Well the 350 does also. One is yellow and one is white. If you look at the diagram the white one runs up to the handlebars and then turns to yellow and comes back. But what i did was to connect the two so that you get the full power of the stator all the time and you let the regulator take care of the extra power. I guess its not necessary but i do it.
That is basically it. You have to change all lights to 12v as well as the fuse. I had a hard time finding a headlight that was 12v and fit the 125 headlight bucket.
My 125s always have a hard time staying charged with the headlight on. Even after converting to 12v i still had this problem. Maybe the rotor is bad. I just run the bike with the headlight off unless its at night.
Also i forgot, you need to change to a 12v battery. Does not need to many amp hours because your not going to push a starter.
You also need to do something about the coil. You can either buy a 12v coil or add resistance. http://www.dotheton.com/forum/index.php?topic=26871.msg314861#msg314861
The other thing to consider is changing the rectifier for a modern one that is more efficient. Bougth parts and made mine but here is the same thing. http://www.oregonmotorcycleparts.com/rectifiers.html
I hope that helps.
Jason
Had a guy from france ask me how to convert to 12v so i did a little write up.
Converting to 12v is not very complicated. First lets make sure we understand each other. The stator is the part on the motor the makes the electricity. The rotor is a magnet that spins around inside the stator. The rectifier converts the electricity from AC current to DC. The regulator keeps the volts from over charging the battery. Ok so the CB125 has most of those parts but does not have the regulator. The 125 has a balanced system. It only creates enough power to run the bike and charge the battery. There are 2 power wires that come out of the stator. 1 makes enough power to run the bike and charge the battery. This one is always on.. The other is for the headlight. When you turn the headlight on this second power wire is also turned on to create enough energy to run the headlight.
Ok, the way I found easiest to convert to 12v you will need 2 things.
1) Stator from a CB350 Twin
2) 12v regulator. I used one from a cb350 twin
The stator fits right into the 125. The plug is different as well as the rubber seal where the wires pass through the case. I cut the plug off the 125 stator and slid the rubber part off. Then i cut the plug off the 350 stator and slid the rubber part onto the 350 stator wires. I had to drill the holes a little to get the wires back in. Then i crimped on new connectors for the 125 plug.
So at this point you have changed the stator to 12v. Now you need to wire in the regulator. I dont remember how that goes but if you look at a wire diagram from a CB350 twin that will explain it better then i can.
http://www.wiringdiagrams21.com/wp-content/uploads/2008/07/Honda-CB350-K4-Wiring-Diagram-1024x738.jpg
Now remember when i said that the 125 has 2 power wires, one for the bike and one for the head light? Well the 350 does also. One is yellow and one is white. If you look at the diagram the white one runs up to the handlebars and then turns to yellow and comes back. But what i did was to connect the two so that you get the full power of the stator all the time and you let the regulator take care of the extra power. I guess its not necessary but i do it.
That is basically it. You have to change all lights to 12v as well as the fuse. I had a hard time finding a headlight that was 12v and fit the 125 headlight bucket.
My 125s always have a hard time staying charged with the headlight on. Even after converting to 12v i still had this problem. Maybe the rotor is bad. I just run the bike with the headlight off unless its at night.
Also i forgot, you need to change to a 12v battery. Does not need to many amp hours because your not going to push a starter.
You also need to do something about the coil. You can either buy a 12v coil or add resistance. http://www.dotheton.com/forum/index.php?topic=26871.msg314861#msg314861
The other thing to consider is changing the rectifier for a modern one that is more efficient. Bougth parts and made mine but here is the same thing. http://www.oregonmotorcycleparts.com/rectifiers.html
I hope that helps.
Jason
